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// Copyright (C) 2009-2012 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0
// (see accompanying file LICENSE_1_0.txt or a copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Home at http://www.boost.org/libs/local_function
#include <boost/local_function.hpp>
#include <boost/typeof/typeof.hpp>
#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
#include <iostream>
#include <cassert>
//[expensive_copy_local_function
struct n {
int i;
n(int _i): i(_i) {}
n(n const& x): i(x.i) { // Some time consuming copy operation.
for (unsigned i = 0; i < 10000; ++i) std::cout << '.';
}
};
BOOST_TYPEOF_REGISTER_TYPE(n) // Register for `bind& x` below.
int main(void) {
n x(-1);
void BOOST_LOCAL_FUNCTION(const bind& x) { // OK: No copy expensive
assert(x.i == -1); // copy but constant.
} BOOST_LOCAL_FUNCTION_NAME(f)
f();
return 0;
}
//]
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